﻿#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int n = 0;
	int count = 0;
	scanf("%d", &n);
	for (int i = 0; i < 32; i++)
	{
		if ((1 & (n >> i)) == 1)
			count++;
	}
	printf("%d\n", count);

	return 0;
}